Javascript to change button text_问答_开发者_运维开发者技术经验分享

开发者 https://www.devze.com 2023-04-06 04:17 出处：网络

i need a javascript function to be called on certain button click, upon that click the button name will change.

i need a javascript function to be called on certain button click, upon that click the button name will change. ie,

<input type=butt开发者_Python百科on id = button1 value=boy onclick=function(boy,girl)>

i need the javascript function to take 2 parameters and check if the value of the button is the first paramter, then the value will become the 2nd and vice versa.

so if i press the button and it says BOY, it will become Girl and if i press the button and it says Girl it will become boy! using javascript please thx.

var foo = function(a,b,c){
  if(a.value==b){
    a.value=c;
  }
  else{
    a.value=b;
  }
};

and for the button

<input type="button" id="button1" value="boy" onclick="foo(this,"boy","girl")">

see here: http://jsfiddle.net/w9ed8/

or:

<input type=button id = button1 value=boy onclick="changeMe(this)">

<script>
function changeMe(obj){
  if(obj.value == "boy"){
     obj.value = "girl"
   }else{
     obj.value = "boy"
   }
}
</script>

<input type=button id = button1 value=boy onclick="changeMe(this, 'boy' , 'girl')">

<script>
function changeMe(obj , param1 , param2){
  if(obj.value == param1 ){
     obj.value = param2
   }else{
     obj.value = param1 
   }
}
</script>

There are many ways to do this, but by getById function showed below you will have a portable function to access to DOM elements by id :

<html>
    <script type="text/javascript">

        function getById(a) {
           if (document.getElementById && document.getElementById(a)) {
              return document.getElementById(a)
           } else {
              if (document.all && document.all(a)) {
                 return document.all(a)
              } else {
                 if (document.layers && document.layers[a]) {
                    return document.layers[a]
                 } else {
                    return false
                 }
              }
           }
        }
        function myfunc()
        {
        getById("button1").value =(getById("button1").value=="boy")?"girl":"boy";
        }
    </script>
<head>
</head>
<input type="button" value="boy" id="button1" onclick="myfunc();" />
</html>

<input type=button id=button1 value=boy onclick='test(this,boy,girl)'>
<script>
      function test(Sender,boy,girl){
        Sender.value = Sender.value == boy ? girl : boy;
      }
</script>

function change()
{
 if((document.getElementById("button1").value)=="Boy")
 {
  document.getElementById("button1").value="Girl"
 }
 else
 {
  document.getElementById("button1").value="Boy"
 }
}